A flatting machine for paper valve bag production

Abstract

The application relates to the technical field of flattening machines, in particular to a flattening machine for paper valve pocket production, which comprises a belt conveyor body, a material pressing table, a movable frame, a flattening roller body, a stepping motor, an anti-edge-warping assembly and an auxiliary flattening assembly. The flattening machine for paper valve pocket production is characterized in that the auxiliary flattening assembly is integrated with a heating sheet, a hollow box shell and a heat-conducting pressing plate, and constitutes an efficient hot-pressing platform. After thermoplasticization, the wrinkles are more easily flattened, the main pressure required for flattening is smaller, and the energy consumption and equipment loss are reduced. After flattening, the material is cooled to rapidly solidify in a new flat shape, the effect is more persistent, the flattening force is persistent and stable, the elastic deformation of the paper bag material is effectively overcome, the bag rebound after flattening is prevented, and the persistence of the flattening effect is ensured.

Description

Technical Field

[0001] This application relates to the field of flattening machine technology, and in particular to a flattening machine for producing paper valve bags. Background Technology

[0002] Paper valve bags have become one of the mainstream packaging forms due to their advantages such as environmental friendliness, high strength, moisture resistance, ease of printing, and high efficiency of automated filling. The production process of valve bags is complex. Among them, pressing the cylindrical bag body, which has been glued and shaped, into a flat state that is easy to stack and transport is a crucial step. The performance of the flattening machine directly determines the appearance quality, stacking stability, and subsequent processing efficiency of the automated packaging line.

[0003] A search revealed that CN204451322U discloses a flattening machine for producing paper packaging bags, comprising a frame and a motor. The frame has several fixed seats. The machine is characterized by having a high-position tensioning shaft and a low-position tensioning shaft at both ends of the frame, with the high-position tensioning shaft higher than the low-position tensioning shaft. Several pressure rollers are positioned between the two high-position tensioning shafts, and several support rollers are positioned between the two low-position tensioning shafts. The pressure rollers and support rollers are mounted on the fixed seats in a one-to-one correspondence. Through the cooperation between the pressure rollers and support rollers on the upper and lower synchronous conveyor belts, the valve bag is flattened and compacted. During the flattening and compaction process, air bubbles generated during adhesive application are discharged from the inclined joint between the upper and lower synchronous conveyor belts, thereby improving the sealing performance of the valve bag.

[0004] Regarding the aforementioned technologies, the inventors believe that the following technical defects exist and need to be improved: the aforementioned device achieves the corner pressing operation through axial pressing, which is only suitable for paper packaging bags with low wrinkles and packaging bags with relatively fixed widths. If packaging bags with large wrinkles and large sizes are flattened, it is very easy to cause "bulges" to form near the pressing edge when flattening, thereby reducing the flattening effect. Summary of the Invention

[0005] This application provides a flattening machine for producing paper valve bags to improve the following technical problem: The above-mentioned device achieves the edge pressing operation by axial pressing, which is only suitable for paper packaging bags with low wrinkling degree and packaging bags with relatively fixed width. If packaging bags with large wrinkling degree and size are flattened, it is very easy to cause the packaging bag near the pressing edge to form a "bulge" when flattening, thereby reducing the flattening effect.

[0006] This application provides a flattening machine for producing paper valve bags, which adopts the following technical solution: A flattening machine for producing paper valve bags includes a belt conveyor body, a pressing table, a movable frame, a flattening roller, a stepper motor, an anti-warping edge assembly, and an auxiliary flattening assembly. The pressing table is fixedly connected to the top of the belt conveyor body. The bottom of the movable frame is threadedly connected to one side of the stepper motor. The motor shaft of the stepper motor is fixedly connected to one end of the flattening roller via a coupling. The flattening roller is rotatably connected to the bottom of the movable frame. The anti-warping edge assembly is symmetrically distributed on both sides of the top of the movable frame. The auxiliary flattening assembly is installed on the top of the belt conveyor body.

[0007] In one feasible technical solution of this application, the anti-warping component includes a support frame, a reduction motor, a drive shaft, an alloy worm gear, a locking gear, a linear shaft, a lifting platform, and a wedge block. The support frame is fixedly connected to the top of the movable frame. The top of the drive shaft is fixedly connected to the motor shaft of the reduction motor via a coupling. The linear shaft is rotatably connected to the opposite side of the support frame. The alloy worm gear is welded to the outside of the drive shaft. The external teeth of the locking gear mesh with the helical surface of the alloy worm gear. The bottom of the lifting platform is slidably connected to the top of the wedge block. The outside of the wedge block is in contact with the corner of the external valve pocket.

[0008] In one feasible technical solution of this application, the auxiliary flattening assembly includes a positioning frame, a heating element, a heat-conducting pressure plate, a hollow housing, and a hydraulic cylinder. The positioning frame is fixedly connected to the upper end of the belt conveyor body, the hollow housing is disposed below the positioning frame, the heating element is installed inside the hollow housing, the top of the heat-conducting pressure plate abuts against the surface of the hollow housing, and the output end of the hydraulic cylinder is fixedly connected to the top surface of the hollow housing.

[0009] In one feasible technical solution of this application, the inner side of the lifting platform is further provided with a rack seat that meshes with the external teeth of the locking gear.

[0010] In one feasible technical solution of this application, an electric telescopic rod and a push rod are also provided on the outer side of the bottom of the lifting platform. The output end of the electric telescopic rod is fixedly connected to one end of the push rod, and the outer side of the push rod is fixedly connected to the top protruding end of the wedge block.

[0011] In one feasible technical solution of this application, the bottom of the lifting platform is further provided with a limiting groove that matches the size of the wedge block.

[0012] In one feasible technical solution of this application, a lifting cylinder and a connecting rod are further provided on the top of the movable frame. The piston end of the lifting cylinder is fixedly connected to one end of the connecting rod, and the bottom of the connecting rod is fixedly connected to the middle of the top of the movable frame.

[0013] In one feasible technical solution of this application, a heating gun is also provided on the side of the pressing table near the flattening roller.

[0014] In summary, this application includes at least one of the following beneficial technical effects: The anti-curling component of this device features wedge-shaped blocks driven by an electric telescopic rod and push rod. While the flattening roller applies pressure to the bag body, it simultaneously applies a continuous, horizontal expansion force from the inside out at the bag's corners. This ensures that even large-sized valve bags with multiple layers, high basis weight, and deep wrinkles are pressed down to be extremely flat and crisp, just like the main body, resulting in a high yield. The auxiliary flattening component integrates heating elements, a hollow housing, and a heat-conducting pressure plate, forming a highly efficient hot-pressing platform. This makes it easier to completely flatten the thermoplasticized wrinkles, requiring less main pressure for flattening, thus reducing energy consumption and equipment wear. After flattening, the material cools and quickly sets in its new flat shape, resulting in a more durable effect. The flattening force remains stable and consistent, effectively overcoming the elastic deformation of the paper bag material, preventing the bag from springing back after flattening, and ensuring the durability of the flattening effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a flattening machine for producing paper valve bags according to an embodiment of this application.

[0017] Figure 2 This is a location diagram of the heating gun in an embodiment of this application.

[0018] Figure 3 This is a distribution diagram of the anti-warping components in the embodiments of this application.

[0019] Figure 4 This is a diagram illustrating the propulsion effect of the wedge block in an embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the connection between the locking gear and the rack seat in an embodiment of this application.

[0021] Figure 6 This is a schematic diagram of the structure of the auxiliary flattening component in the embodiments of this application.

[0022] Explanation of reference numerals in the attached figures: 2. Rack and pinion seat; 3. Electric telescopic rod; 4. Push rod; 5. Limiting groove; 6. Lifting cylinder; 7. Connecting rod; 8. Heating gun; 11. Belt conveyor body; 12. Pressing table; 13. Movable frame; 14. Flattening roller; 15. Stepper motor; 16. Anti-warping component; 17. Auxiliary flattening component; 161. Support frame; 162. Gear motor; 163. Drive shaft; 164. Alloy worm gear; 165. Locking gear; 166. Linear shaft; 167. Lifting platform; 168. Wedge block; 171. Positioning frame; 172. Heating plate; 173. Heat-conducting pressure plate; 174. Hollow box shell; 175. Hydraulic cylinder. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0026] This application discloses a flattening machine for producing paper valve bags. (See also...) Figures 1 to 6 The flattening machine for producing paper valve bags includes a belt conveyor body 11, a pressing table 12, a movable frame 13, a flattening roller 14, a stepper motor 15, an anti-warping component 16, and an auxiliary flattening component 17. The pressing table 12 is fixedly connected to the top of the belt conveyor body 11. The bottom of the movable frame 13 is threadedly connected to one side of the stepper motor 15. The motor shaft of the stepper motor 15 is fixedly connected to one end of the flattening roller 14 through a coupling. The flattening roller 14 is rotatably connected to the bottom of the movable frame 13. The anti-warping component 16 is symmetrically distributed on both sides of the top of the movable frame 13. The auxiliary flattening component 17 is installed on the top of the belt conveyor body 11.

[0027] The anti-warping assembly 16 includes a support frame 161, a reduction motor 162, a drive shaft 163, an alloy worm gear 164, a locking gear 165, a linear shaft 166, a lifting platform 167, and a wedge block 168. The support frame 161 is fixedly connected to the top of the movable frame 13. The top of the drive shaft 163 is fixedly connected to the motor shaft of the reduction motor 162 via a coupling. The linear shaft 166 is rotatably connected to the opposite side of the support frame 161. The alloy worm gear 164 is welded to the outside of the drive shaft 163. The external teeth of the locking gear 165 mesh with the helical surface of the alloy worm gear 164. The bottom of the lifting platform 167 is slidably connected to the top of the wedge block 168. The outside of the wedge block 168 is in contact with the corner of the outer valve pocket.

[0028] The auxiliary flattening assembly 17 includes a positioning frame 171, a heating element 172, a heat-conducting pressure plate 173, a hollow housing 174, and a hydraulic cylinder 175. The positioning frame 171 is fixedly connected to the upper end of the belt conveyor body 11. The hollow housing 174 is located below the positioning frame 171. The heating element 172 is installed inside the hollow housing 174. The top of the heat-conducting pressure plate 173 abuts against the surface of the hollow housing 174. The output end of the hydraulic cylinder 175 is fixedly connected to the top surface of the hollow housing 174.

[0029] The inner side of the lifting platform 167 is also provided with a rack seat 2 that meshes with the external teeth of the locking gear 165.

[0030] The bottom outer side of the lifting platform 167 is also equipped with an electric telescopic rod 3 and a push rod 4. The output end of the electric telescopic rod 3 is fixedly connected to one end of the push rod 4, and the outer side of the push rod 4 is fixedly connected to the top protruding end of the wedge block 168.

[0031] The bottom of the lifting platform 167 is also provided with a limiting groove 5 that matches the size of the wedge block 168.

[0032] The top of the movable frame 13 is also equipped with a lifting cylinder 6 and a connecting rod 7. The piston end of the lifting cylinder 6 is fixedly connected to one end of the connecting rod 7, and the bottom of the connecting rod 7 is fixedly connected to the middle of the top of the movable frame 13.

[0033] A heating gun 8 is also provided on the side of the pressing table 12 near the flattening roller 14.

[0034] The operation process of the flattening machine for producing paper valve bags according to this application embodiment is roughly as follows: The cylindrical valve bag is conveyed to the flattening station by the belt conveyor body 11. The bag is precisely transported onto the pressing table 12, ready for flattening. For valve bags with harder materials or deeper wrinkles, the heating gun 8 can be activated. The heating gun 8 locally blows and heats the bag body, softening the paper fibers and coating material, reducing the resistance to subsequent flattening, and improving the flattening effect. The lifting cylinder 6 pushes the connecting rod 7, causing the entire movable frame 13 to descend to the preset working height. The reduction motor 162 starts, driving the drive shaft 163 and the alloy worm gear 164 on it to rotate. The alloy worm gear 164 drives the locking gear 165 that meshes with it to rotate. Since the locking gear 165 meshes with the rack seat 2 fixed on the lifting platform 167, the rotational motion is converted into linear motion, and the lifting platform 167 is precisely controlled to descend along the linear axis 166 until the bottom limiting groove 5 approaches the corner of the bag. Then, the electric telescopic rod 3 is activated, pushing the push rod 4 to push the wedge block 168 horizontally out of the limiting groove 5, so that its outer side fits tightly against the inner side of the corner of the valve bag, providing an expansion support force from the inside out for flattening.

[0035] During the heat-assisted shaping process, the heating element 172 is energized and generates heat. The heat is conducted through the hollow shell 174 to the heat-conducting pressure plate 173, making it a constant-temperature heat-conducting pressure plate. The stepper motor 15 starts, driving the flattening roller 14 to rotate at high speed. Under pressure, the entire movable frame 13 tightly presses the flattening roller 14 onto the surface of the bag and conveys it forward. As the bag moves forward, its bottom first passes through the preheated heat-conducting pressure plate 173 for preheating and preliminary shaping, and then is finally rolled by the rotating flattening roller 14, thus achieving a highly efficient flattening effect.

[0036] The beneficial technical effects of the flattening machine for producing paper valve bags according to the embodiments of this application are roughly as follows: The wedge block 168 in the anti-curling component 16 of this device is driven by the electric telescopic rod 3 and the push rod 4. While the flattening roller 14 applies pressure to the main body of the bag, it applies a continuous, horizontal expansion force from the inside out from the corners of the bag. This ensures that even for large-sized valve bags with multiple layers, high basis weight, and deep wrinkles, the corners can be pressed extremely flat and crisp, just like the main body of the bag, resulting in a high yield. The auxiliary flattening component 17 integrates the heating element 172, the hollow box shell 174, and the heat-conducting pressure plate 173, forming a highly efficient hot pressing platform. The wrinkles after thermoplasticization are easier to flatten completely, and the main pressure required for flattening is also smaller, reducing energy consumption and equipment wear. After flattening, the material cools and can quickly set in a new flat shape, resulting in a longer-lasting effect. The flattening force is also stable and long-lasting, effectively overcoming the elastic deformation of the paper bag material, preventing the bag from rebounding after flattening, and ensuring the durability of the flattening effect.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flattening machine for producing paper valve bags, characterized in that, The system includes a belt conveyor body (11), a pressing table (12), a movable frame (13), a flattening roller (14), a stepper motor (15), an anti-warping component (16), and an auxiliary flattening component (17). The pressing table (12) is fixedly connected to the top of the belt conveyor body (11). The bottom of the movable frame (13) is threadedly connected to one side of the stepper motor (15). The motor shaft of the stepper motor (15) is fixedly connected to one end of the flattening roller (14) through a coupling. The flattening roller (14) is rotatably connected to the bottom of the movable frame (13). The anti-warping component (16) is symmetrically distributed on both sides of the top of the movable frame (13). The auxiliary flattening component (17) is installed on the top of the belt conveyor body (11). The anti-warping component (16) includes a support frame (161), a reduction motor (162), a drive shaft (163), an alloy worm gear (164), a locking gear (165), a linear shaft (166), a lifting platform (167), and a wedge block (168). The support frame (161) is fixedly connected to the top of the movable frame (13). The top of the drive shaft (163) is fixedly connected to the motor shaft of the reduction motor (162) via a coupling. The linear shaft (166) is rotatably connected to the opposite side of the support frame (161). The alloy worm gear (164) is welded to the outside of the drive shaft (163). The external teeth of the locking gear (165) mesh with the helical surface of the alloy worm gear (164). The bottom of the lifting platform (167) is slidably connected to the top of the wedge block (168). The outside of the wedge block (168) is in contact with the corner of the outer valve pocket. The auxiliary flattening assembly (17) includes a positioning frame (171), a heating element (172), a heat-conducting pressure plate (173), a hollow housing (174), and a hydraulic cylinder (175). The positioning frame (171) is fixedly connected to the upper end of the belt conveyor body (11). The hollow housing (174) is located below the positioning frame (171). The heating element (172) is installed inside the hollow housing (174). The top of the heat-conducting pressure plate (173) abuts against the surface of the hollow housing (174). The output end of the hydraulic cylinder (175) is fixedly connected to the top surface of the hollow housing (174).

2. The flattening machine for producing paper valve bags according to claim 1, characterized in that, The inner side of the lifting platform (167) is also provided with a rack seat (2) that meshes with the external teeth of the locking gear (165).

3. The flattening machine for producing paper valve bags according to claim 1, characterized in that, The bottom outer side of the lifting platform (167) is also provided with an electric telescopic rod (3) and a push rod (4). The output end of the electric telescopic rod (3) is fixedly connected to one end of the push rod (4), and the outer side of the push rod (4) is fixedly connected to the top protruding end of the wedge block (168).

4. The flattening machine for producing paper valve bags according to claim 3, characterized in that, The bottom of the lifting platform (167) is also provided with a limiting groove (5) that is adapted to the size of the wedge block (168).

5. The flattening machine for producing paper valve bags according to claim 1, characterized in that, The top of the movable frame (13) is also provided with a lifting cylinder (6) and a connecting rod (7). The piston end of the lifting cylinder (6) is fixedly connected to one end of the connecting rod (7), and the bottom of the connecting rod (7) is fixedly connected to the middle of the top of the movable frame (13).

6. The flattening machine for producing paper valve bags according to claim 1, characterized in that, A heating gun (8) is also provided on the side of the pressing table (12) near the pressing roller (14).

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